Steric Effects in Displacement Reactions. V. The Heat of Reaction of Pyridine with Boron Trifluoride. A Convenient Calorimeter for Measuring the Heat of Formation of Molecular Addition Compounds

1955 ◽  
Vol 77 (7) ◽  
pp. 1730-1733 ◽  
Author(s):  
Herbert C. Brown ◽  
Raymond H. Horowitz
Keyword(s):  
Boron Trifluoride ◽  
Heat Of Formation ◽  
Steric Effects ◽  
Heat Of Reaction ◽  
Displacement Reactions

Ketene. III. Heat of Formation and Heat of Reaction with Alcohols

1934 ◽  
Vol 56 (11) ◽  
pp. 2268-2270 ◽  
Author(s):  
F. O. Rice ◽  
Joseph Greenberg
Keyword(s):  
Heat Of Formation ◽  
Heat Of Reaction

Thermodynamics of methanesulfonic acid revisited

2000 ◽  
Vol 78 (10) ◽  
pp. 1295-1298 ◽  
Author(s):  
J Peter Guthrie ◽  
Roger T Gallant
Keyword(s):  
Methanesulfonic Acid ◽  
Heat Of Formation ◽  
Methyl Methanesulfonate ◽  
Thermodynamic Quantities ◽  
Heat Of Reaction ◽  
Reaction Conditions ◽  
Free Energy Of Formation ◽  
Sulfite Ion ◽  
Energy Of Formation

Recently we reported a study of the thermodynamics of methanesulfonic acid and some of its derivatives. The foundation of these results was a measurement of the heat of reaction of S-methyl thioacetate with aq sodium hypochlorite, leading to methanesulfonic acid. We have reinvestigated this reaction and discovered that contrary to the initial stoichiometry experiments, the stoichiometry under the reaction conditions is not as was believed and that the heat of reaction observed was spuriously high. We have found a new reaction, that of sulfite ion with methyl methanesulfonate, which does allow a clean determination of the heat of formation of methanesulfonic acid. Revised thermodynamic quantities for methanesulfonic acid, methanesulfonyl chloride, and methyl methanesulfonate are reported here.Key words: sulfonic acid, heat of reaction, free energy of formation, SN2 reaction.

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